CN104836446B - The control method of isolated converter, control circuit and Switching Power Supply - Google Patents
The control method of isolated converter, control circuit and Switching Power Supply Download PDFInfo
- Publication number
- CN104836446B CN104836446B CN201510233160.5A CN201510233160A CN104836446B CN 104836446 B CN104836446 B CN 104836446B CN 201510233160 A CN201510233160 A CN 201510233160A CN 104836446 B CN104836446 B CN 104836446B
- Authority
- CN
- China
- Prior art keywords
- signal
- voltage
- isolated converter
- circuit
- during
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000001514 detection method Methods 0.000 claims description 87
- 238000004804 winding Methods 0.000 claims description 48
- 230000008859 change Effects 0.000 claims description 19
- 230000005611 electricity Effects 0.000 claims description 14
- 238000012512 characterization method Methods 0.000 claims description 8
- 238000007689 inspection Methods 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 claims 1
- 238000005070 sampling Methods 0.000 description 30
- 230000008569 process Effects 0.000 description 10
- 230000001276 controlling effect Effects 0.000 description 8
- 230000004044 response Effects 0.000 description 5
- 230000005284 excitation Effects 0.000 description 4
- 230000000875 corresponding effect Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000002459 sustained effect Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000003466 anti-cipated effect Effects 0.000 description 1
- 210000001367 artery Anatomy 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
- H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
- H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
- H02M3/325—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
- H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
- H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
- H02M3/325—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33507—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0032—Control circuits allowing low power mode operation, e.g. in standby mode
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0048—Circuits or arrangements for reducing losses
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
This application provides a kind of control method of isolated converter, control circuit and Switching Power Supply.In the control circuit and method, wake-up signal is produced by setting different threshold values during the different working modes of isolated converter, so as to can both make isolated converter be in the output voltage during dynamic load to fall value smaller, to accelerate the dynamic responding speed of system, isolated converter can be made again during the load steady state of standy operation mode, worked with low-down working frequency, effectively reduce idling consumption.
Description
Technical field
The present invention relates to field of switch power, more specifically to a kind of control method of isolated converter, control
Circuit and Switching Power Supply.
Background technology
The Switching Power Supply of primary-side-control because the device of system is few, simple structure, low cost and other advantages, in field of power supplies such as
It is used widely in LED drive power, charger and adapter etc..
In the primary-side-control system that prior art is realized, as shown in figure 1, the detection to output voltage is by transformation
The detection of device vice-side winding voltage comes what is realized indirectly.This primary-side-control system can't in real time be examined to output voltage
Survey, and simply the voltage in the assists winding of each switch periods sampling transformer realizes the detection to output voltage, makes
Proper output loading from underloading or zero load to heavy duty or it is fully loaded switch over when, primary-side-control system can not in time obtain output electricity
The change information of pressure, so as to cause the dynamic property of system very poor.On the other hand, the dynamic response of this primary-side-control system is special
Property also limit underloading or it is unloaded when system frequency reduction, so as to limit the reduction of system standby power consumption.
The content of the invention
In view of this, the present invention provides a kind of control method of isolated converter, control circuit and Switching Power Supply, to solve
Certainly prior art dynamic response and the afoul problem of stability, while can also reduce the problem of idling consumption.
A kind of control method of isolated converter, the isolated converter is included by primary side winding and vice-side winding structure
Into transformer and primary side winding connection main switch and vice-side winding connection continued flow tube, it is characterised in that the control
Method processed includes：
A wake-up signal is set to control isolated converter described in the first voltage characterization at the vice-side winding two ends
The change information of output voltage；
The second voltage signal for characterizing the first voltage signal is obtained in the primary side side of the isolated converter；
The second voltage signal is detected, and the on off state of the main switch is controlled according to testing result, made described
The value of output voltage is maintained desired value；
Wherein, during the dynamic load during the isolated converter is in normal mode of operation, according to described
Output voltage produces the wake-up signal with the magnitude relationship of first threshold voltage,
During the load steady state during the isolated converter is in standy operation mode, according to the output electricity
Pressure produces the wake-up signal with the magnitude relationship of second threshold voltage,
During the dynamic load during the isolated converter is in standy operation mode, according to the output electricity
Pressure produces the wake-up signal with the magnitude relationship of the 3rd threshold voltage.
Preferably, the control method is additionally included in the primary side feedback signal that the output voltage is detected in the primary side side,
To control the on off state of the main switch.
Preferably, during the isolated converter is in standy operation mode, the control mould of the primary side side is made
The control module of block and the secondary side enters sleep pattern.
Preferably, the control method be additionally included in the isolated converter during the dynamic load, increase institute
State the pulsewidth and frequency of the drive signal of main switch.
A kind of control circuit of isolated converter, the isolated converter is included by primary side winding and vice-side winding structure
Into transformer and primary side winding connection main switch and vice-side winding connection continued flow tube, it is characterised in that including：
Secondary controller, for producing wake-up signal according to the output voltage of the isolated converter, and makes described calling out
The change of the output voltage of isolated converter described in the first voltage characterization at the awake signal control vice-side winding two ends
Information,
Wherein, according to described defeated during the dynamic load during the isolated converter is in normal mode of operation
Go out voltage and produce the wake-up signal with the magnitude relationship of first threshold voltage,
During the load steady state during the isolated converter is in standy operation mode, according to the output electricity
Pressure produces the wake-up signal with the magnitude relationship of second threshold voltage,
During the dynamic load during the isolated converter is in standy operation mode, according to the output electricity
Pressure produces the wake-up signal with the magnitude relationship of the 3rd threshold voltage,
Primary side feedback circuit, the second voltage signal of the first voltage signal is characterized for obtaining；
Primary controller, for detecting the second voltage signal, and controls the main switch according to testing result
On off state, makes the value of the output voltage of the isolated converter be maintained desired value.
Preferably, the secondary controller includes：
Whether first secondary detects circuit, for detecting the output voltage less than first threshold voltage, and produces first
Secondary detection signal；
Whether second secondary detects circuit, for detecting the output voltage less than second threshold voltage, and produces second
Secondary detection signal；
Whether 3rd secondary detects circuit, for detecting the output voltage less than the 3rd threshold voltage, and produces the 3rd
Secondary detection signal；
Secondary pattern detection circuit, the mode of operation current for detecting the isolated converter, and export secondary mould
Formula detection signal；
Wake up and produce circuit, receive the first secondary detection signal, the second secondary detection signal, the 3rd secondary detection letter
Number and secondary mode detection signal produce the wake-up signal.
Preferably, when the continued flow tube is diode, the secondary controller also includes and the diodes in parallel
On-off circuit, the wake-up signal controls the first voltage to believe by the conducting and off-state for controlling the on-off circuit
Number.
Preferably, secondary pattern detection circuit control makes the secondary controller in the isolated converter in standby
Enter sleep pattern when during mode of operation.
Preferably, the primary controller includes：
Pulse detection decoding circuit, for detecting the second voltage signal, generation is used to control the main switch to open
First primary side detection signal of off status.
Preferably, the primary controller also includes：
Primary side feedback controls circuit, detects the primary side feedback signal of the output voltage, and generation is used to control the master to open
Close the second primary side detection signal of pipe on off state；
Pulse duration frequency circuit, pulse duration frequency control is produced according to the first primary side detection signal and the second primary side detection signal
Signal processed, during the dynamic load, the arteries and veins of the drive signal of the main switch is increased with the isolated converter
Wide and frequency；
Drive circuit, receives the first primary side detection signal, the second primary side detection signal and pulse duration frequency control signal
Produce the drive signal.
Preferably, the primary controller also includes primary side pattern detection circuit, for detecting the isolated converter
Current mode of operation, so that the primary controller is entered when the isolated converter is in during standy operation mode
Enter sleep pattern.
A kind of Switching Power Supply, includes the transformer that is made up of primary side winding and vice-side winding and primary side winding connection
Power switch pipe and the continued flow tube being connected with vice-side winding, it is characterised in that also wrap the control electricity stated described in any one
Road.
Therefore, the present embodiment provide isolated converter control and method by isolated converter not
Wake-up signal is produced with different threshold values are set during mode of operation, so as to isolated converter is in dynamic add
Output voltage during load falls that value is smaller, to accelerate the dynamic responding speed of system, isolated converter can be made to exist again
During the load steady state of standy operation mode, worked with low-down working frequency, effectively reduce idling consumption.
Brief description of the drawings
Fig. 1 is a kind of primary-side-control circuit of the prior art；
Fig. 2 is the circuit diagram according to a kind of control embodiment of circuit one of isolated converter of the invention；
Fig. 3 is that the circuit that controls shown in Fig. 2 is in the dynamic load phase of normal mode of operation process in isolated converter
Between working waveform figure；
Fig. 4 is that the circuit that controls shown in Fig. 2 is in the load steady state phase of standy operation mode process in isolated converter
Between working waveform figure；
Fig. 5 is that the circuit that controls shown in Fig. 2 is in the dynamic load phase of standy operation mode process in isolated converter
Between working waveform figure.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
With reference to Fig. 2, the embodiment circuit diagram according to a kind of control circuit of isolated converter of the invention is shown.
In the present embodiment, the isolated converter is by taking inverse excitation type converter as an example, but is not limited to and this, the isolated converter
Receive input voltage signal VIN, to provide the output voltage Vo of stabilization for load.Specifically, the inverse excitation type converter is included
The main switch S of transformer and the primary side winding connection being made up of primary side winding Np and vice-side winding Ns1And and vice-side winding
The continued flow tube of connection, in the present embodiment, the continued flow tube is with diode D1As a example by, and the diode is connected on isolated converter
(the application is equally also adapted to the situation that continued flow tube connects position, i.e. continued flow tube one end is connected with vice-side winding, the other end for bottom
Be grounded by output capacitance, and the anode of output capacitance termination output plus terminal), i.e., the diode cathode connect the secondary around
Group, anode is connected to reference ground.
With reference to shown in Fig. 2, in the present embodiment, the control circuit of the isolated converter includes secondary controller
01st, primary side feedback circuit 02, primary controller 03.
Secondary controller 01, for producing wake-up signal VTS, and the wake-up signal is controlled the vice-side winding two ends
First voltage signal VTSECCharacterize the change information of the output voltage of the isolated converter.Secondary controller 01 produces institute
State wake-up signal VTSDetailed process it is as follows：
During the dynamic load during the isolated converter is in normal mode of operation, the secondary controller
Magnitude relationship according to the output voltage and first threshold voltage produces the wake-up signal；
During the load steady state during the isolated converter is in standy operation mode, the secondary controller
Magnitude relationship according to the output voltage and second threshold voltage produces the wake-up signal；
During the dynamic load during the isolated converter is in standy operation mode, the secondary controller
Magnitude relationship according to the output voltage and the 3rd threshold voltage produces the wake-up signal.
Can be seen that it by the generation process of wake-up signal is a characterized output voltage produced according to output voltage
The signal of change information, therefore its controllable first voltage signal can also characterize the change information of output voltage.In the present embodiment
In, secondary controller 01 also includes and diode D1The on-off circuit being connected in parallel, wake-up signal VTSCan be described by control
The conducting of on-off circuit and off-state control the change information of the first voltage characterization output voltage.Specifically,
The principle of wake-up signal control first voltage characterization output voltage will be with reference to working waveform figure in the further part of the application
Do specific analysis.
With reference to shown in Fig. 2, secondary controller 01 includes the first secondary detection circuit, the detection of the second secondary in the present embodiment
Circuit, the 3rd secondary detection circuit, secondary pattern detection circuit and wake-up produce circuit.
First secondary detects circuit, for detecting the output voltage VoWhether first threshold voltage is less than, and produces the
One secondary detection signal VDS1.First secondary detection circuit can specifically include that second resistance potential-divider network, sampling keep electricity
Road, 3rd resistor potential-divider network, the first comparison circuit.Second resistance potential-divider network is used for the output voltage VoDivided
Pressure, to obtain output partial pressure VOFB.Sampling hold circuit receives output partial pressure VOFBWith in the fixed time of each switch periods
Output partial pressure is sampled, voltage V is kept to obtain samplingOSH.Specifically, sampling hold circuit also receives fly-wheel diode
The voltage V of cathode terminalD, sampling time point is obtained with according to the voltage, such as voltage VDCharacterize sustained diode1Afterflow terminates
When, sampling hold circuit starts sampling output partial pressure VOFBAnd export sampling holding voltage VOSH, the voltage is by 3rd resistor point
Sampling partial pressure V is obtained after pressure network network partial pressureREFN.First comparison circuit compares output partial pressure and sampling partial pressure, and it is secondary to export first
Side detection signal VDS1.Wherein, sampling partial pressure is equal to the output partial pressure V with the ratio value of the first voltage threshold valueOFBWith institute
State the ratio value of output voltage Vo.Therefore, first comparison circuit can be by relatively more described output partial pressure VOFBWith the sampling
Partial pressure VREFNSize carry out the size of output voltage described in comparing and the first threshold voltage.
In the present embodiment, the first threshold voltage is characterized by the sampling partial pressure, and partial pressure of sampling is by previous
The sampled voltage of the output voltage of the fixed time of individual switch periods is determined, therefore the first threshold voltage is one actually
With the value of output voltage dynamic change, the value of falling that can control the output voltage is always maintained at a lower value.For example pass through
Setting to second resistance potential-divider network and 3rd resistor potential-divider network so that the sampling partial pressure VREFNIt is output partial pressure VOFB
97% (being not limited to this), even if first threshold voltage always be output voltage Vo97%, then be capable of achieving output voltage Vo
When during dynamic load of the isolated converter in normal mode of operation, output voltage VoValue of falling at most drop to
3%, effective wake-up signal V will be producedTS, and by detecting second voltage signal VZCSTo detect the wake-up signal, so that
Perceive output voltage to decline, quickly to control the on off state of main switch in primary side side, make output voltage VoRise, to tie up
It is desired value to hold.Thus, it is this during isolated converter is in normal mode of operation, make first threshold voltage with output
The detection mode of voltage itself dynamic change, is conducive to improving the dynamic responding speed of isolated converter.As shown in Fig. 2
Second resistance potential-divider network is by resistance R in the present embodiment3、R4Constitute, 3rd resistor potential-divider network is by resistance R5、R6Constitute.When
So, in other embodiments, the first secondary detection circuit also may not include second resistance potential-divider network and 3rd resistor partial pressure net
Network, the then direct sampling and outputting voltage of sampling hold circuit, output is the first threshold voltage, and the first comparison circuit is straight
Connect the size for comparing output voltage and first threshold voltage.First comparison circuit can be realized using first comparator A, its same phase
End receives sampling partial pressure VREFN, end of oppisite phase reception output partial pressure VOFB, the first secondary detection signal V of output end outputDS1。
Whether second secondary detects circuit, for detecting the output voltage less than second threshold voltage, and produces second
Secondary detection signal VDS2.Specific the second secondary detection circuit described in the present embodiment includes the second comparator B, its same phase
End receives a reference voltage V for fixed valueREFS, end of oppisite phase reception output partial pressure VOFB, output end output the second secondary inspection
Survey signal VDS2.Wherein, reference voltage VREFSOutput partial pressure and the institute are equal to the direct ratio value of the second threshold voltage
State the direct ratio value of output voltage.
Whether 3rd secondary detects circuit, for detecting the output voltage less than the 3rd threshold voltage, and produces the 3rd
Secondary detection signal VDS3.Specifically, the 3rd secondary detection circuit is compared by the 4th resistance pressure-dividing network and the 3rd in the present embodiment
Constituted compared with device C.4th resistance pressure-dividing network is by reference voltage VREFSPartial pressure is carried out, to obtain benchmark partial pressure VREFA.3rd comparator
The in-phase end of C receives benchmark partial pressure VREFA, end of oppisite phase reception output partial pressure VOFB, output end the 3rd secondary detection signal of output
VDS3.Wherein, benchmark partial pressure VREFAWith the ratio that the ratio value of the 3rd threshold voltage is equal to the output partial pressure and the output voltage
Example value, therefore benchmark partial pressure VREFAThe 3rd threshold voltage can be characterized, and makes the value of the 3rd threshold voltage less than described
The value of second threshold voltage.Because the isolated converter is during the load steady state of standy operation mode, output voltage by
Reference voltage VREFSTo determine, partial pressure V is exportedOFBReference voltage V is maintained during this periodREFSValue, and in standy operation mode
Dynamic load during, export partial pressure VOFBDrop-out value by benchmark partial pressure VREFATo determine.Therefore, can be by the 4th resistance
The setting of potential-divider network, can make benchmark partial pressure VREFAReference voltage V equal to 97%REFS, then can control the isolated converter
During the dynamic load of standy operation mode, the value of falling of output voltage Vo is 3%.Once output partial pressure VOFBIt is reduced to base
Quasi- partial pressure VREFAWhen, that is, the 97% of the output voltage desired value being reduced to during the load steady state during standy operation mode
When, secondary controller will produce wake-up signal VTS, primary controller is controlled the corresponding actions of main switch, make output voltage
Desired value is quickly maintained, the dynamic responding speed during accelerating standy operation mode.
Secondary pattern detection circuit is used to detect the current mode of operation of the isolated converter, and exports secondary pattern
Detection signal VDM.Secondary mode detection signal may indicate that the isolated converter is presently at normal mode of operation and still locates
In standy operation mode, specific secondary pattern detection circuit can be according to continued flow tube D1Cathode terminal voltage it is isolated to detect
The mode of operation of converter.Additionally, when the secondary mode detection signal indicates isolated converter to enter standy operation mode,
Secondary controller 01 can be also set to enter sleep pattern, to reduce the static working current of secondary controller.Secondary controller enters
The meaning of sleep pattern is represented herein：Make except the second secondary detection circuit, the 3rd secondary detection circuit and wake-up signal
Produce the uncorrelated circuit beyond circuit that closed mode is in during standy operation mode, only retain and sleep pattern phase
The circuit work of pass.
Wake up and produce circuit, for receiving the first secondary detection signal VDS1, the second secondary detection signal VDS2, the 3rd
Secondary detection signal VDS3With secondary mode detection signal VDMProduce the wake-up signal VTS.Wake up and produce circuit in secondary pattern
Under the control of detection signal, determine by the first secondary detection signal VDS1, the second secondary detection signal VDS2, the 3rd secondary detection letter
Number VDS3In which produce the wake-up signal VTS。
Further, since in the present embodiment, the continued flow tube of isolated converter is diode D1, then secondary controller 01 also
Including the on-off circuit with the diodes in parallel, the wake-up signal VTSBy the conducting and disconnection that control the on-off circuit
State controls the first voltage signal VTSEC.Specifically, the on-off circuit can be a switch S2, it is connected to two
Pole pipe D1Anode tap and cathode terminal between, and by wake-up signal VTSControl turn-on and turn-off.As wake-up signal VTSFor it is high when, institute
State switching tube S2Conducting, therefore the first voltage signal is changed into high level, even if the first voltage signal can characterize institute
State the change information of output voltage.
Primary side feedback circuit 02 is located at the primary side side of the isolated converter, is obtained described in sign with the primary side side
The second voltage signal V of first voltage signalZCS。
As shown in Fig. 2 the primary side feedback circuit 02 specifically includes the primary side winding N with transformer T in the present embodimentP
With vice-side winding NSThe primary side assists winding N of couplingA, first resistor potential-divider network.Primary side assists winding NAObtain and described first
Voltage signal VTSECProportional primary side boost voltage, first resistor potential-divider network will obtain described after primary side boost voltage partial pressure
Second voltage signal VZCS.As shown in Fig. 2 first resistor potential-divider network is by resistance R1、R2Constitute, but in other embodiments may be used
It is not limited to this.Due to the first voltage signal VTSECCharacterize the wake-up signal VTS, and the second voltage signal
Characterize the first voltage signal, therefore the wake-up signal VTSActually by the coupling of vice-side winding and primary side assists winding
Relation is passed to the primary side side of the isolated converter, and in the primary side side by the second voltage signal VZCSCarry out table
Levy.Again due to the change information of output voltage described in the first voltage characterization, therefore, can be examined by the primary side side
Survey the second voltage signal to detect the change information of the output voltage, so as to can realize to the isolated converter
Control.
Primary controller 03, positioned at the primary side side, for detecting the second voltage signal, and according to testing result control
The on off state of the main switch is made, the value of the output voltage of the isolated converter is maintained desired value.
In the present embodiment, primary controller 03 includes：Pulse detection decoding circuit, for detecting the second voltage letter
Number VZCS, produce and be used to control the first primary side detection signal V of the main switch on off stateDP1.The pulse detection decoding
Circuit receives the second voltage signal Vzcs, it is decoded after would know that the change information of output voltage, when it is determined that the output
Voltage (has wake-up signal V when being less than expected magnitude of voltageTSDuring generation), then produce the first primary side detection signal VDP1, control institute
State main switch S1Conducting, the energy of secondary is transferred to increase from primary side, finally causes that the output voltage signal is maintained
Expected magnitude of voltage.
Additionally, primary controller also includes primary side feedback control circuit, pulse duration frequency circuit and drive circuit.Primary side feedback
Control circuit, the primary side feedback signal for detecting the output voltage, generation is used to control the main switch on off state
The second primary side detection signal VDP2.Here primary side feedback signal is just in the present embodiment second voltage signal VZCS, at it
Also the primary side feedback signal of output voltage can be obtained in its embodiment in the primary side side otherwise.Primary side feedback is controlled
Circuit by detecting whether primary side feedback signal is its desired value so that the value of the output voltage is in the isolated conversion
Device is maintained the desired value needed for loading during being in the load steady state of normal mode of operation.
Pulse duration frequency circuit, according to the first primary side detection signal VDP1With the second primary side detection signal VDP2Produce pulse duration frequency
Control signal VPW, with the dynamic load phase in normal mode of operation or standy operation mode of the isolated converter
Between, increase the pulsewidth and frequency of the drive signal of the main switch, to further speed up response of the system in dynamic load
Speed.
Drive circuit, receives the first primary side detection signal VDP1, the second primary side detection signal VDP2With pulse duration frequency control
Signal V processedPWProduce the drive signal VGS.Drive signal VGSTurn-on and turn-off for controlling main switch, by this implementation
The scheme of example, can make drive signal VGSIn the isolated converter in normal mode of operation (or standy operation mode)
Frequency and pulsewidth during dynamic load are more than its frequency during normal mode of operation (or standy operation mode) load steady state
Rate and pulsewidth, and during the load steady state of standy operation mode, with low-down working frequency and pulsewidth.
Additionally, primary controller 03 also includes primary side pattern detection circuit, it is current for detecting the isolated converter
Mode of operation so that the primary controller the isolated converter be in standy operation mode during when enter fall asleep
Sleep mode.Primary controller refers into sleep pattern：When isolated converter enters standy operation mode, make primary-side-control
In device except with produce the first primary side detection signal VDP1Signal beyond correlation is in closed mode, further to reduce
The idling consumption of isolated converter.
It should be noted that in this application during load steady state, during referring to non-dynamic loading, i.e., isolated converter
Load tend towards stability substantially state, and refer to that load is rapidly switched to heavy duty or full from unloaded or underloading during dynamic load
During the dynamic load process of load.
Therefore, the control circuit of the isolated converter that the present embodiment is provided is by the difference in isolated converter
Set different threshold values during mode of operation to produce wake-up signal, so as to can both make isolated converter be in dynamic load
The output voltage of period falls that value is smaller, to accelerate the dynamic responding speed of system, isolated converter can again treated
During the load steady state of machine mode of operation, worked with low-down working frequency, effectively reduce idling consumption.
The control principle and work of the control circuit that will to provide the application respectively in connection with Fig. 3, Fig. 4, Fig. 5 and Fig. 2 below
It is described further as process.
Fig. 3 is that the primary-side-control circuit shown in Fig. 2 adds in the dynamic that isolated converter is in normal mode of operation process
Working waveform figure during load.In figure 3, IoIt is the output current of isolated converter, VDIt is sustained diode1Cathode terminal
Voltage, TSIt is sampling hold circuit according to voltage VDThe sampled signal for being obtained is (when the signal is high level to output voltage
Sampled).In t1~t4Period, switch controlling signal VGSBy the second detection signal VDP2Control is produced.In t2Moment, main switch
Pipe S1Shut-off, continued flow tube D1Off state is switched to, i.e., now afterflow terminates, sampling hold circuit is according to voltage VDIn t3Moment
Produce effective sampled signal TS(also can start sampling in continued flow tube turn-on instant).Now, sampling hold circuit is to output electricity
The partial pressure V of pressureOFBSampling holding is carried out, sampling is obtained and is kept voltage VOSH, 3rd resistor potential-divider network makes sampling partial pressure VREFNDeng
Sampling in 97% keeps voltage VOSH(being not limited to this), the first comparator A output partial pressure VOFBWith sampling partial pressure
VREFNSize.To t4Moment, isolated converter carries out dynamic load, and output current starts rapid rising, and output voltage starts
Decline, to t5Moment, the partial pressure V of output voltageOFBDrop into sampling partial pressure VREFN, i.e. output voltage VoRelative to sampling instant
Fall 3% for value, then now first comparator A produces effective first secondary detection signal VDS1, it is electric that control wakes up generation
Road produces has certain pulsewidth (such as t5To t6Between width) wake-up signal VTS, on signal control vice-side winding the
One voltage signal VTSECIt is changed into high level, and second voltage signal VZCSAlso it is changed into high level, when the detection of pulse detection decoding circuit
To second voltage signal VZCSValue be more than certain value, and second voltage signal VZCSPulsewidth be more than certain value when, i.e., in t6When
Carve, produce first detection signal VDP1, the signal is controlled to produce pulse duration frequency signal V to pulse duration frequency circuitPW, make drive
Dynamic circuit quickly produces cluster drive signal to be controlled output voltage with larger pulsewidth and frequency higher, is added with reaching
The purpose of speed system dynamic response.
Fig. 4 is that the primary-side-control circuit shown in Fig. 2 is steady in the load that isolated converter is in standy operation mode process
Working waveform figure during state.In due to the embodiment of the present application, isolated converter is in during standy operation mode and sleep
Sleep mode, then the mode detection signal V that secondary sleep pattern is exportedDMWhether isolated converter can be indicated in stand-by operation
Pattern (sleep pattern).As shown in figure 4, working as mode detection signal VDM(V during indicating isolated change to be in sleep patternDMPlace
In between high period), output partial pressure VOFBWith reference voltage VREFSIt is reference voltage, as output partial pressure VOFBDrop into the magnitude of voltage
When, just produce effective wake-up signal VTS, so as to produce corresponding switch controlling signal VGS, i.e., during this period, according to output electricity
The partial pressure V of pressureOFBWith reference voltage VREFSMagnitude relationship produce switch controlling signal VGS, output voltage is maintained above-mentioned
Second threshold voltage.It can be seen that switch controlling signal V during thisGSPulsewidth it is smaller, frequency is also smaller, so as to have
There is relatively low idling consumption.
Fig. 5 is that the primary-side-control circuit shown in Fig. 2 adds in the dynamic that isolated converter is in standy operation mode process
Working waveform figure during load.
As shown in figure 5, in f1-f4Period, mode detection signal VDMIn effective status, then illustrate at isolated converter
During sleep pattern, then the course of work now in Fig. 4 controls main switch S1, the partial pressure of output voltage is made during this
VOFBIt is maintained voltage VREFSValue.During sleep pattern, in f2There is loading, output in moment, the load of isolated converter
Electric current rises rapidly, and output voltage declines, i.e., in f2After moment, the dynamic that isolated converter is in sleep mode procedures adds
During load, to t3Moment, the partial pressure V of output voltageOFBDrop to above-mentioned voltage VREFA(voltage can be VREFS97%),
Illustrate now output voltage with respect to standy operation mode load steady state during value for fallen 3%, now, secondary is produced
It is raw one or more have larger pulsewidth (here larger be the load steady state during relative standy operation mode during call out
Wake up signal pulsewidth for) wake-up signal VTSTo react the change information of output voltage, and by the signal transmission to primary side,
To produce the switch controlling signal V of larger pulsewidth and larger frequency in primary sideGSOutput voltage is set rapidly to be raised to desired voltage,
Effectively raise the dynamic response characteristic of system.
Therefore, the control circuit of the isolated converter that the present embodiment is provided is by the difference in isolated converter
Set different threshold values during mode of operation to produce wake-up signal, so as to can both make isolated converter be in dynamic load
The output voltage of period falls that value is smaller, to accelerate the dynamic responding speed of system, isolated converter can again treated
During the load steady state of machine mode of operation, worked with low-down working frequency, effectively reduce idling consumption.
The embodiment of the present application also discloses a kind of control method of isolated converter, for controlling isolated converter,
Isolated converter described in the present embodiment is inverse excitation type converter, but is not limited to this.Inverse excitation type converter is included by original
Transformer and the main switch of primary side winding connection and the continued flow tube of vice-side winding connection that side winding and vice-side winding are constituted.
The control method of the isolated converter disclosed in the present embodiment mainly includes：
The wake-up signal for producing the secondary side of the isolated converter controls first electricity at the vice-side winding two ends
The change information of the output voltage of isolated converter described in pressure characterization；
A second voltage signal for characterizing the first voltage signal is obtained in the primary side side of the isolated converter；
The second voltage signal is detected, and the on off state of the main switch is controlled according to testing result, made described
The value of output voltage is maintained desired value；
Wherein, during the dynamic load during the isolated converter is in normal mode of operation, the secondary
Lateral root produces the wake-up signal according to the magnitude relationship of the output voltage and first threshold voltage,
During the load steady state during the isolated converter is in standy operation mode, the secondary lateral root evidence
The output voltage produces the wake-up signal with the magnitude relationship of second threshold voltage,
During the dynamic load during the isolated converter is in standy operation mode, the secondary lateral root evidence
The magnitude relationship of the output voltage and the 3rd threshold voltage produces the wake-up signal.
Further, the control method is additionally included in the primary side feedback letter that the output voltage is detected in the primary side side
Number, to control the on off state of the main switch.
Additionally, methods described is additionally included in the isolated converter is in period during standy operation mode, make institute
The control module of the control module and the secondary side of stating primary side side enters sleep operation mode.Further, described
Isolated converter during the dynamic load, can also increase the pulsewidth and frequency of the drive signal of the main switch.
Present invention also provides a kind of Switching Power Supply, it has the transformer and original being made up of primary side winding and vice-side winding
The power switch pipe of side winding connection and the continued flow tube being connected with vice-side winding, it is characterised in that also including appointing in the application
The control circuit of the isolated converter anticipated described in an embodiment.
According to embodiments of the invention as described above, these embodiments do not have all of details of detailed descriptionthe, not yet
It is only described specific embodiment to limit the invention.As described above, can make many modifications and variations.This specification is chosen
And these embodiments are specifically described, it is in order to preferably explain principle of the invention and practical application, so that affiliated technology is led
Field technique personnel can be used using modification of the invention and on the basis of the present invention well.The present invention only receives claims
And its limitation of four corner and equivalent.
Claims (12)
1. a kind of control method of isolated converter, the isolated converter includes being made up of primary side winding and vice-side winding
Transformer and primary side winding connection main switch and vice-side winding connection continued flow tube, it is characterised in that the control
Method includes：
A wake-up signal is set to control the output of isolated converter described in the first voltage characterization at the vice-side winding two ends
The change information of voltage；
The second voltage signal for characterizing the first voltage signal is obtained in the primary side side of the isolated converter；
The second voltage signal is detected, and the on off state of the main switch is controlled according to testing result, make the output
The value of voltage is maintained desired value；
Wherein, during the dynamic load during the isolated converter is in normal mode of operation, according to the output
Voltage produces the wake-up signal with the magnitude relationship of first threshold voltage,
The isolated converter be in standy operation mode during load steady state during, according to the output voltage with
The magnitude relationship of second threshold voltage produces the wake-up signal so that the output voltage is maintained the Second Threshold electricity
Pressure,
The isolated converter be in standy operation mode during dynamic load during, according to the output voltage with
The magnitude relationship of the 3rd threshold voltage produces the wake-up signal, to control the output voltage dropping to the 3rd threshold value
Rise during voltage, the 3rd threshold voltage is the partial pressure of the second threshold voltage.
2. control method according to claim 1, it is characterised in that be additionally included in the primary side side detection output electricity
The primary side feedback signal of pressure, to control the on off state of the main switch.
3. control method according to claim 2, it is characterised in that be in stand-by operation mould in the isolated converter
During formula, the control module of the control module of the primary side side and the secondary side is set to enter sleep pattern.
4. control method according to claim 2, it is characterised in that be additionally included in the isolated converter in dynamic
During state is loaded, increase the pulsewidth and frequency of the drive signal of the main switch.
5. a kind of control circuit of isolated converter, the isolated converter includes being made up of primary side winding and vice-side winding
Transformer and primary side winding connection main switch and vice-side winding connection continued flow tube, it is characterised in that including：
Secondary controller, for producing wake-up signal according to the output voltage of the isolated converter, and believes described wake-up
The change information of the output voltage of isolated converter described in the first voltage characterization at number control vice-side winding two ends,
Wherein, according to the output electricity during the dynamic load during the isolated converter is in normal mode of operation
Pressure produces the wake-up signal with the magnitude relationship of first threshold voltage,
The isolated converter be in standy operation mode during load steady state during, according to the output voltage with
The magnitude relationship of second threshold voltage produces the wake-up signal so that the output voltage is maintained the Second Threshold electricity
Pressure,
The isolated converter be in standy operation mode during dynamic load during, according to the output voltage with
The magnitude relationship of the 3rd threshold voltage produces the wake-up signal, to control the output voltage dropping to the 3rd threshold value
Rise during voltage, the 3rd threshold voltage is the partial pressure of the second threshold voltage；
Primary side feedback circuit, the second voltage signal of the first voltage signal is characterized for obtaining；
Primary controller, for detecting the second voltage signal, and controls the switch of the main switch according to testing result
State, makes the value of the output voltage of the isolated converter be maintained desired value.
6. control circuit according to claim 5, it is characterised in that the secondary controller includes：
Whether first secondary detects circuit, for detecting the output voltage less than first threshold voltage, and produces the first secondary
Detection signal；
Whether second secondary detects circuit, for detecting the output voltage less than second threshold voltage, and produces the second secondary
Detection signal；
Whether 3rd secondary detects circuit, for detecting the output voltage less than the 3rd threshold voltage, and produces the 3rd secondary
Detection signal；
Secondary pattern detection circuit, the mode of operation current for detecting the isolated converter, and export the inspection of secondary pattern
Survey signal；
Wake up and produce circuit, receive the first secondary detection signal, the second secondary detection signal, the 3rd secondary detection signal and
Secondary mode detection signal produces the wake-up signal.
7. control circuit according to claim 6, it is characterised in that when the continued flow tube is diode, the secondary
Controller also includes on-off circuit with the diodes in parallel, and the wake-up signal is by controlling the conducting of the on-off circuit
The first voltage signal is controlled with off-state.
8. control circuit according to claim 6, it is characterised in that secondary pattern detection circuit controls the secondary control
Device enters sleep pattern when the isolated converter is in during standy operation mode.
9. control circuit according to claim 5, it is characterised in that the primary controller includes：
Pulse detection decoding circuit, for detecting the second voltage signal, generation is used to control the main switch switch shape
First primary side detection signal of state.
10. control circuit according to claim 9, it is characterised in that the primary controller also includes：
Primary side feedback controls circuit, detects the primary side feedback signal of the output voltage, and generation is used to control the main switch
Second primary side detection signal of on off state；
Pulse duration frequency circuit, pulse duration frequency control signal is produced according to the first primary side detection signal and the second primary side detection signal,
During the dynamic load, to increase the pulsewidth and frequency of the drive signal of the main switch in the isolated converter
Rate；
Drive circuit, receives the first primary side detection signal, the second primary side detection signal and pulse duration frequency control signal and produces
The drive signal.
11. control circuits according to claim 10, it is characterised in that the primary controller is also examined including primary side pattern
Slowdown monitoring circuit, the mode of operation current for detecting the isolated converter makes the primary controller in the isolated change
Enter sleep pattern when parallel operation is during standy operation mode.
12. a kind of Switching Power Supplies, it is characterised in that including the control circuit described in any one in claim 5-11.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510233160.5A CN104836446B (en) | 2015-05-08 | 2015-05-08 | The control method of isolated converter, control circuit and Switching Power Supply |
| US15/130,740 US9762128B2 (en) | 2015-05-08 | 2016-04-15 | Control circuit of isolated converter and switching power supply, and control method for the same |
| TW105114111A TWI624141B (en) | 2015-05-08 | 2016-05-06 | Control method, control circuit, and switching power of isolated converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510233160.5A CN104836446B (en) | 2015-05-08 | 2015-05-08 | The control method of isolated converter, control circuit and Switching Power Supply |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104836446A CN104836446A (en) | 2015-08-12 |
| CN104836446B true CN104836446B (en) | 2017-06-16 |
Family
ID=53814127
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510233160.5A Active CN104836446B (en) | 2015-05-08 | 2015-05-08 | The control method of isolated converter, control circuit and Switching Power Supply |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US9762128B2 (en) |
| CN (1) | CN104836446B (en) |
| TW (1) | TWI624141B (en) |
Families Citing this family (33)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104767372B (en) * | 2015-04-24 | 2017-12-19 | 矽力杰半导体技术(杭州)有限公司 | Control circuit, control method and apply its inverse excitation type converter |
| TWI580162B (en) * | 2015-05-25 | 2017-04-21 | 立錡科技股份有限公司 | Power converter and control circuit and standby power saving method thereof |
| CN105471291B (en) * | 2015-12-31 | 2018-07-20 | 深圳宝砾微电子有限公司 | A kind of inverse-excitation type AC-DC voltage conversion circuits and inverse-excitation type electric pressure converter |
| US9954447B2 (en) * | 2016-01-13 | 2018-04-24 | Lite-On Electronics (Guangzhou) Limited | Power supply apparatus |
| CN106992664B (en) * | 2016-01-21 | 2019-05-21 | 产晶积体电路股份有限公司 | Isolated power conversion system |
| JP7040884B2 (en) * | 2016-07-25 | 2022-03-23 | コニカミノルタ株式会社 | Power supply, image forming device and control method |
| CN106655762B (en) | 2017-01-11 | 2019-06-18 | 南京矽力杰半导体技术有限公司 | Isolated form Switching capacitors |
| CN106685233B (en) | 2017-01-12 | 2019-04-05 | 南京矽力杰半导体技术有限公司 | Passive boost network and the DC-DC boost converter for applying it |
| CN108880293B (en) * | 2017-05-12 | 2021-01-05 | 通嘉科技股份有限公司 | Secondary controller applied to secondary side of power converter and operation method thereof |
| CN108964417A (en) * | 2017-05-19 | 2018-12-07 | 硕天科技股份有限公司 | adapter |
| CN107124101B (en) | 2017-05-22 | 2019-06-21 | 南京矽力杰半导体技术有限公司 | Isolated form Switching capacitors |
| CN107422779B (en) | 2017-08-21 | 2019-02-22 | 南京矽力杰半导体技术有限公司 | Voltage regulator |
| US10326371B2 (en) | 2017-08-23 | 2019-06-18 | Semiconductor Components Industries, Llc | Providing adaptive output power |
| US10320301B2 (en) | 2017-09-15 | 2019-06-11 | Semiconductor Components Industries, Llc | Power converter responsive to device connection status |
| CN108092513B (en) | 2017-12-26 | 2020-03-06 | 矽力杰半导体技术(杭州)有限公司 | DC-DC converter |
| CN110932560B (en) | 2017-12-26 | 2021-03-30 | 矽力杰半导体技术(杭州)有限公司 | DC-DC converter |
| CN108418432B (en) * | 2018-03-06 | 2019-12-31 | 茂睿芯（深圳）科技有限公司 | Control circuit and control method for improving load dynamic response and switching power supply |
| CN108539981A (en) | 2018-06-04 | 2018-09-14 | 南京矽力杰半导体技术有限公司 | DC-to-DC converter |
| CN108712073B (en) | 2018-06-08 | 2020-01-03 | 南京矽力杰半导体技术有限公司 | Three-level DC-DC converter |
| CN108736709B (en) | 2018-06-14 | 2020-02-04 | 南京矽力杰半导体技术有限公司 | Power converter |
| KR102638182B1 (en) * | 2018-12-26 | 2024-02-16 | 엘지전자 주식회사 | Image display apparatus |
| CN109782839B (en) | 2019-01-04 | 2020-07-07 | 南京矽力微电子技术有限公司 | Voltage regulator |
| US11442484B2 (en) | 2019-01-04 | 2022-09-13 | Silergy Semiconductor Technology (Hangzhou) Ltd | Voltage regulator |
| US10778108B2 (en) * | 2019-02-15 | 2020-09-15 | Apple Inc. | Frequency doubling resonant converter |
| CN110277909B (en) | 2019-07-09 | 2022-09-20 | 南京矽力微电子技术有限公司 | Switched capacitor converter, current control circuit and current control method |
| US10931204B1 (en) * | 2019-11-12 | 2021-02-23 | Monolithic Power Systems, Inc. | Isolated resonant converter with fixed output ripple |
| DE102019219032A1 (en) * | 2019-12-06 | 2021-06-10 | Robert Bosch Gmbh | Wake-up process for electrical networks in a vehicle with an electric drive train |
| CN111224540B (en) | 2019-12-20 | 2021-04-06 | 南京矽力微电子技术有限公司 | Switch capacitor converter and driving circuit thereof |
| EP3890445A1 (en) * | 2020-03-31 | 2021-10-06 | Tridonic GmbH & Co. KG | Primary side switched converter for providing a voltage supply to an led load |
| TWI796201B (en) * | 2021-12-08 | 2023-03-11 | 通嘉科技股份有限公司 | Method of switching operational modes of a power converter |
| CN114499214B (en) * | 2022-04-15 | 2022-07-29 | 深圳市洛仑兹技术有限公司 | Signal transmission device and switching power supply equipment |
| TWI855702B (en) * | 2022-10-28 | 2024-09-11 | 立錡科技股份有限公司 | Flyback power converter and secondary side power supply circuit and control method thereof |
| CN117595617B (en) * | 2024-01-18 | 2024-04-16 | 成都利普芯微电子有限公司 | Transient response control circuit and switching converter |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000354372A (en) * | 1999-06-09 | 2000-12-19 | Nec Corp | Switching power unit |
| JP2005117852A (en) * | 2003-10-10 | 2005-04-28 | Matsushita Electric Ind Co Ltd | Switching power supply device |
| CN102055341A (en) * | 2009-10-29 | 2011-05-11 | Bcd半导体制造有限公司 | Control circuit of switching power supply and switching power supply |
| CN102291000A (en) * | 2011-08-29 | 2011-12-21 | 上海新进半导体制造有限公司 | Switch power supply integrated circuit |
| CN102710127A (en) * | 2011-01-11 | 2012-10-03 | 瑞昱半导体股份有限公司 | Single-inductance double-output power converter and driving method thereof |
| CN102843050A (en) * | 2012-07-12 | 2012-12-26 | 上海新进半导体制造有限公司 | Method and circuit for improving system output characteristics of switch power supply |
| CN103746566A (en) * | 2014-01-21 | 2014-04-23 | 成都芯源系统有限公司 | Primary side controlled switching power supply and control method thereof |
| CN104300793A (en) * | 2014-07-17 | 2015-01-21 | 矽力杰半导体技术(杭州)有限公司 | Control method and control circuit for improving load dynamic response and switching power supply |
Family Cites Families (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7362593B2 (en) * | 2004-09-16 | 2008-04-22 | System General Corp. | Switching control circuit having off-time modulation to improve efficiency of primary-side controlled power supply |
| US7777461B2 (en) * | 2005-10-31 | 2010-08-17 | Chil Semiconductor Corporation | Power supply and controller circuits |
| US7936575B2 (en) * | 2008-06-24 | 2011-05-03 | Infineon Technologies Austria Ag | Synchronous rectifier control using load condition determination |
| US20140254215A1 (en) * | 2011-08-29 | 2014-09-11 | Power Systems Technologies Ltd. | Controller for a power converter and method of operating the same |
| TWI496396B (en) * | 2012-02-18 | 2015-08-11 | Richtek Technology Corp | Isolated power converter circuit and control circuit and control method thereof |
| US8873254B2 (en) * | 2012-03-12 | 2014-10-28 | Linear Technology Corporation | Isolated flyback converter with sleep mode for light load operation |
| US9602018B2 (en) * | 2012-03-20 | 2017-03-21 | Infineon Technologies Austria Ag | Power converter with reduced power consumption in standby mode |
| CN102638169B (en) | 2012-05-08 | 2014-11-05 | 矽力杰半导体技术(杭州)有限公司 | Control circuit and control method of flyback convertor and alternating current-direct current power converting circuit applying control circuit of flyback convertor |
| CN102710152B (en) | 2012-06-06 | 2015-12-02 | 矽力杰半导体技术(杭州)有限公司 | The AC-DC voltage conversion circuit of a kind of high efficiency, response fast |
| CN102882377B (en) | 2012-09-20 | 2014-11-05 | 矽力杰半导体技术(杭州)有限公司 | Synchronous rectifying control method and circuit |
| US9154039B2 (en) * | 2012-09-20 | 2015-10-06 | Dialog Semiconductor Inc. | Switching power converter with secondary-side dynamic load detection and primary-side feedback and control |
| TWI463780B (en) * | 2012-11-16 | 2014-12-01 | Noveltek Semiconductor Corp | Isolated power converter, inverting type shunt regulator, and operating method thereof |
| CN103490605B (en) * | 2013-10-12 | 2015-12-23 | 成都芯源系统有限公司 | Isolated switch converter and controller and control method thereof |
| CN103887984B (en) | 2014-03-28 | 2017-05-31 | 矽力杰半导体技术(杭州)有限公司 | Isolated converter and apply its Switching Power Supply |
| US9543844B2 (en) * | 2014-04-01 | 2017-01-10 | Infineon Technologies Austria Ag | System and method for a switched-mode power supply |
| CN106208706B (en) * | 2014-08-08 | 2019-07-05 | 意法半导体股份有限公司 | Power circuit, related transmitting line, integrated circuit and the method for sending signal |
| TWI565211B (en) * | 2014-09-12 | 2017-01-01 | Alpha And Omega Semiconductor (Cayman) Ltd | Constant on-time switching converter |
| CN104578826B (en) * | 2014-12-31 | 2018-10-19 | 上海新进半导体制造有限公司 | Switching Power Supply and the method that constant pressure and current constant control are provided in Switching Power Supply |
-
2015
- 2015-05-08 CN CN201510233160.5A patent/CN104836446B/en active Active
-
2016
- 2016-04-15 US US15/130,740 patent/US9762128B2/en active Active
- 2016-05-06 TW TW105114111A patent/TWI624141B/en active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000354372A (en) * | 1999-06-09 | 2000-12-19 | Nec Corp | Switching power unit |
| JP2005117852A (en) * | 2003-10-10 | 2005-04-28 | Matsushita Electric Ind Co Ltd | Switching power supply device |
| CN102055341A (en) * | 2009-10-29 | 2011-05-11 | Bcd半导体制造有限公司 | Control circuit of switching power supply and switching power supply |
| CN102710127A (en) * | 2011-01-11 | 2012-10-03 | 瑞昱半导体股份有限公司 | Single-inductance double-output power converter and driving method thereof |
| CN102291000A (en) * | 2011-08-29 | 2011-12-21 | 上海新进半导体制造有限公司 | Switch power supply integrated circuit |
| CN102843050A (en) * | 2012-07-12 | 2012-12-26 | 上海新进半导体制造有限公司 | Method and circuit for improving system output characteristics of switch power supply |
| CN103746566A (en) * | 2014-01-21 | 2014-04-23 | 成都芯源系统有限公司 | Primary side controlled switching power supply and control method thereof |
| CN104300793A (en) * | 2014-07-17 | 2015-01-21 | 矽力杰半导体技术(杭州)有限公司 | Control method and control circuit for improving load dynamic response and switching power supply |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201640795A (en) | 2016-11-16 |
| US20160329816A1 (en) | 2016-11-10 |
| CN104836446A (en) | 2015-08-12 |
| TWI624141B (en) | 2018-05-11 |
| US9762128B2 (en) | 2017-09-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104836446B (en) | The control method of isolated converter, control circuit and Switching Power Supply | |
| CN203352442U (en) | Fixed-frequency constant on-off time controlling apparatus of dynamic adjusting switch converter | |
| CN103326546B (en) | Fixing turn-off time peak current mode pulse sequence control method and device thereof | |
| CN103677034B (en) | Standby circuit and standby control method of household appliance | |
| CN103236790B (en) | Method and device for controlling half-hysteresis ring pulse sequences of switching power supply in continuous working mode | |
| CN103414342A (en) | Fixed-frequency constant on-off time control method of dynamic voltage regulating switch converter | |
| CN203368015U (en) | A surge inhibition current protective device | |
| CN105553303B (en) | Standby control system for primary side feedback AC DC Switching Power Supplies | |
| CN107231096A (en) | The multistage loop control circuit of primary side feedback Switching Power Supply | |
| CN202735879U (en) | Standby circuit of household appliance | |
| CN202190212U (en) | Overvoltage control circuit, low-power-consumption power circuit and television | |
| CN204497972U (en) | A kind of novel retention time circuit structure | |
| CN103872890B (en) | Switching power supply circuit with short-circuit protection function | |
| CN104836444B (en) | The control method and circuit of a kind of self adaptation blanking time | |
| CN103118204A (en) | Mobile terminal of switch machine control and switch machine control method thereof | |
| CN102412746B (en) | A kind of inverse-excitation type switch power-supply circuit improving cross regulation rate | |
| CN207368866U (en) | It is a kind of to include the high potential energy collecting device that turn off start-up circuit | |
| CN103259447B (en) | Superconducting magnet lifting station control system | |
| CN103199688B (en) | Switching power supply and power-on impact current suppression method thereof | |
| CN201656775U (en) | Switching power supply monocyclic fixed-frequency hysteresis-loop control device | |
| CN207150163U (en) | Surge current suppression circuit module | |
| CN202135070U (en) | Dual-voltage capacitance-resistance voltage-reduction energy saving circuit | |
| CN204669228U (en) | A kind of electric supply system inverter circuit being easy to extended power | |
| CN202362382U (en) | Phase identification device for three-phase alternating current power supply | |
| CN207166370U (en) | Low-loss constant-current constant-voltage circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder |
Address after: 310051 No. 6 Lianhui Street, Xixing Street, Binjiang District, Hangzhou City, Zhejiang Province Patentee after: Silergy Semiconductor Technology (Hangzhou ) Co., Ltd. Address before: 310012 Wensanlu Road, Hangzhou Province, No. 90 East Software Park, science and technology building A1501 Patentee before: Silergy Semiconductor Technology (Hangzhou ) Co., Ltd. |
|
| CP02 | Change in the address of a patent holder |